<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      const num = prompt('请输入一个数字')
      const isPalindrome = function (x) {
        const arr = x.split('')
        if (arr.join('') == arr.reverse().join('')) {
          return true
        } else {
          return false
        }
      }
      console.log(isPalindrome(num));
    </script>
  </body>
</html>
